Grounding line migration from 1992 to 2011 on Petermann Glacier, North-West Greenland
ABSTRACT We use satellite radar interferometry to investigate changes in the location of the Petermann Glacier grounding line between 1992 and 2011. The grounding line location was identified in 17 quadruple-difference interferograms produced from European Remote Sensing (ERS)-1/2 data – the most ex...
Published in: | Journal of Glaciology |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
2016
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1017/jog.2016.83 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143016000836 |
id |
crcambridgeupr:10.1017/jog.2016.83 |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1017/jog.2016.83 2024-06-23T07:50:06+00:00 Grounding line migration from 1992 to 2011 on Petermann Glacier, North-West Greenland HOGG, ANNA E. SHEPHERD, ANDREW GOURMELEN, NOEL ENGDAHL, MARCUS 2016 http://dx.doi.org/10.1017/jog.2016.83 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143016000836 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Journal of Glaciology volume 62, issue 236, page 1104-1114 ISSN 0022-1430 1727-5652 journal-article 2016 crcambridgeupr https://doi.org/10.1017/jog.2016.83 2024-06-12T04:04:31Z ABSTRACT We use satellite radar interferometry to investigate changes in the location of the Petermann Glacier grounding line between 1992 and 2011. The grounding line location was identified in 17 quadruple-difference interferograms produced from European Remote Sensing (ERS)-1/2 data – the most extensive time series assembled at any ice stream to date. There is close agreement (20.6 cm) between vertical displacement of the floating ice shelf and relative tide amplitudes simulated by the Arctic Ocean Dynamics-based Tide Model 5 (AODTM-5) Arctic tide model. Over the 19 a period, the groundling line position varied by 470 m, on average, with a maximum range of 7.0 km observed on the north-east margin of the ice stream. Although the mean range (2.8 km) and variability (320 m) of the grounding line position is considerably lower if the unusually variable north-east sector is not considered, our observations demonstrate that large, isolated movements cannot be precluded, thus sparse temporal records should be analysed with care. The grounding line migration observed on Petermann Glacier is not significantly correlated with time ( R 2 = 0.22) despite reported ice shelf thinning and episodes of large iceberg calving, which suggests that unlike other ice streams, on the south-west margin of the Greenland ice sheet, Petermann Glacier is dynamically stable. Article in Journal/Newspaper Arctic Arctic Ocean glacier Greenland Ice Sheet Ice Shelf Iceberg* Journal of Glaciology Petermann glacier Cambridge University Press Arctic Arctic Ocean Greenland Journal of Glaciology 62 236 1104 1114 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
ABSTRACT We use satellite radar interferometry to investigate changes in the location of the Petermann Glacier grounding line between 1992 and 2011. The grounding line location was identified in 17 quadruple-difference interferograms produced from European Remote Sensing (ERS)-1/2 data – the most extensive time series assembled at any ice stream to date. There is close agreement (20.6 cm) between vertical displacement of the floating ice shelf and relative tide amplitudes simulated by the Arctic Ocean Dynamics-based Tide Model 5 (AODTM-5) Arctic tide model. Over the 19 a period, the groundling line position varied by 470 m, on average, with a maximum range of 7.0 km observed on the north-east margin of the ice stream. Although the mean range (2.8 km) and variability (320 m) of the grounding line position is considerably lower if the unusually variable north-east sector is not considered, our observations demonstrate that large, isolated movements cannot be precluded, thus sparse temporal records should be analysed with care. The grounding line migration observed on Petermann Glacier is not significantly correlated with time ( R 2 = 0.22) despite reported ice shelf thinning and episodes of large iceberg calving, which suggests that unlike other ice streams, on the south-west margin of the Greenland ice sheet, Petermann Glacier is dynamically stable. |
format |
Article in Journal/Newspaper |
author |
HOGG, ANNA E. SHEPHERD, ANDREW GOURMELEN, NOEL ENGDAHL, MARCUS |
spellingShingle |
HOGG, ANNA E. SHEPHERD, ANDREW GOURMELEN, NOEL ENGDAHL, MARCUS Grounding line migration from 1992 to 2011 on Petermann Glacier, North-West Greenland |
author_facet |
HOGG, ANNA E. SHEPHERD, ANDREW GOURMELEN, NOEL ENGDAHL, MARCUS |
author_sort |
HOGG, ANNA E. |
title |
Grounding line migration from 1992 to 2011 on Petermann Glacier, North-West Greenland |
title_short |
Grounding line migration from 1992 to 2011 on Petermann Glacier, North-West Greenland |
title_full |
Grounding line migration from 1992 to 2011 on Petermann Glacier, North-West Greenland |
title_fullStr |
Grounding line migration from 1992 to 2011 on Petermann Glacier, North-West Greenland |
title_full_unstemmed |
Grounding line migration from 1992 to 2011 on Petermann Glacier, North-West Greenland |
title_sort |
grounding line migration from 1992 to 2011 on petermann glacier, north-west greenland |
publisher |
Cambridge University Press (CUP) |
publishDate |
2016 |
url |
http://dx.doi.org/10.1017/jog.2016.83 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143016000836 |
geographic |
Arctic Arctic Ocean Greenland |
geographic_facet |
Arctic Arctic Ocean Greenland |
genre |
Arctic Arctic Ocean glacier Greenland Ice Sheet Ice Shelf Iceberg* Journal of Glaciology Petermann glacier |
genre_facet |
Arctic Arctic Ocean glacier Greenland Ice Sheet Ice Shelf Iceberg* Journal of Glaciology Petermann glacier |
op_source |
Journal of Glaciology volume 62, issue 236, page 1104-1114 ISSN 0022-1430 1727-5652 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2016.83 |
container_title |
Journal of Glaciology |
container_volume |
62 |
container_issue |
236 |
container_start_page |
1104 |
op_container_end_page |
1114 |
_version_ |
1802640860578316288 |